2M4V

Mycobacterium tuberculosis RNA polymerase binding protein A (RbpA) and its interactions with sigma factors

SOLUTION NMR

NMR Experiment
Experiment	Type	Sample Contents	Solvent	Ionic Strength	pH	Pressure	Temperature (K)	Spectrometer
1	2D 1H-1H TOCSY	0.30-0.35 mM [U-15N] RbpA, 100 mM potassium chloride, 25 mM potassium phosphate, 0.5 mM DTT, 0.5 mM EDTA, 0.02 w/v sodium azide, 0.5 mM TCEP, 0.2 mM AEBSF protease inhibitor	100% D2O	0.1	6.5	ambient	308
2	2D 1H-1H NOESY	0.30-0.35 mM [U-15N] RbpA, 100 mM potassium chloride, 25 mM potassium phosphate, 0.5 mM DTT, 0.5 mM EDTA, 0.02 w/v sodium azide, 0.5 mM TCEP, 0.2 mM AEBSF protease inhibitor	100% D2O	0.1	6.5	ambient	308
3	2D 1H-15N HSQC	0.30-0.35 mM [U-15N] RbpA, 100 mM potassium chloride, 25 mM potassium phosphate, 0.5 mM DTT, 0.5 mM EDTA, 0.02 w/v sodium azide, 0.5 mM TCEP, 0.2 mM AEBSF protease inhibitor	95% H2O/5% D2O	0.1	6.5	ambient	308
4	3D 1H-15N NOESY	0.30-0.35 mM [U-15N] RbpA, 100 mM potassium chloride, 25 mM potassium phosphate, 0.5 mM DTT, 0.5 mM EDTA, 0.02 w/v sodium azide, 0.5 mM TCEP, 0.2 mM AEBSF protease inhibitor	95% H2O/5% D2O	0.1	6.5	ambient	308
5	3D HNCACB	0.30-0.35 mM [U-13C; U-15N]-His-Phe-Tyr-Trp RbpA, 100 mM potassium chloride, 25 mM potassium phosphate, 0.5 mM DTT, 0.5 mM EDTA, 0.02 w/v sodium azide, 0.5 mM TCEP, 0.2 mM AEBSF protease inhibitor	95% H2O/5% D2O	0.1	6.5	ambient	308
6	3D HNCO	0.30-0.35 mM [U-13C; U-15N]-His-Phe-Tyr-Trp RbpA, 100 mM potassium chloride, 25 mM potassium phosphate, 0.5 mM DTT, 0.5 mM EDTA, 0.02 w/v sodium azide, 0.5 mM TCEP, 0.2 mM AEBSF protease inhibitor	95% H2O/5% D2O	0.1	6.5	ambient	308
7	3D 1H-13C NOESY	0.30-0.35 mM [U-13C; U-15N]-His-Phe-Tyr-Trp RbpA, 100 mM potassium chloride, 25 mM potassium phosphate, 0.5 mM DTT, 0.5 mM EDTA, 0.02 w/v sodium azide, 0.5 mM TCEP, 0.2 mM AEBSF protease inhibitor	95% H2O/5% D2O	0.1	6.5	ambient	308
8	3D 1H-15N TOCSY	0.30-0.35 mM [U-15N] RbpA, 100 mM potassium chloride, 25 mM potassium phosphate, 0.5 mM DTT, 0.5 mM EDTA, 0.02 w/v sodium azide, 0.5 mM TCEP, 0.2 mM AEBSF protease inhibitor	95% H2O/5% D2O	0.1	6.5	ambient	308

NMR Spectrometer Information
Spectrometer	Manufacturer	Model	Field Strength
1	Bruker	AVANCE	600
2	Bruker	DRX	600
3	Bruker	AVANCE II	800

NMR Refinement
Method	Details	Software
simulated annealing		TopSpin

NMR Ensemble Information
Conformer Selection Criteria	structures with the lowest energy
Conformers Calculated Total Number	100
Conformers Submitted Total Number	35
Representative Model	1 (closest to the average)

Computation: NMR Software
#	Classification	Version	Software Name	Author
1	processing	TopSpin		Bruker Biospin
2	collection	TopSpin		Bruker Biospin
3	refinement	Amber		Case, Darden, Cheatham, III, Simmerling, Wang, Duke, Luo, ... and Kollman
4	structure solution	CYANA		Guntert, Mumenthaler and Wuthrich
5	data analysis	Sparky		Goddard

RCSB PDB Core Operations are funded by the National Science Foundation (DBI-1832184), the US Department of Energy (DE-SC0019749), and the National Cancer Institute, National Institute of Allergy and Infectious Diseases, and National Institute of General Medical Sciences of the National Institutes of Health under grant R01GM133198.